BOOST 2024 - 16th International Workshop on Boosted Object Phenomenology, Reconstruction, Measurements, and Searches at Colliders

Session

BSM

31 Jul 2024, 09:00

Palazzo Ducale (Genova, Italy)

14. Boosted H->bb tagging searches

Fabrizio Parodi (Istituto Nazionale di Fisica Nucleare)

31/07/2024, 09:00

BSM

Talk

Several physics scenarios beyond the Standard Model predict the existence of new particles that can subsequently decay into a pair of Higgs bosons. These include pairs of SM-like Higgs bosons (HH) as well as asymmetric decays into two scalars of different masses (SH). For sufficiently high masses, the scalar S and the Higgs boson are Lorentz-boosted, thus the decay products are produced...

62. Searches for Higgs boson production through decays of heavy resonances

Suman Chatterjee (Austrian Academy of Sciences (AT))

31/07/2024, 09:20

BSM

Talk

Search channels including at least one Higgs boson plus another particle have formed an important part of the program of new physics searches. In this talk, the status of these searches by the CMS Collaboration is reviewed. Searches are discussed for resonances decaying to two Higgs bosons, a Higgs and a vector boson, or a Higgs boson and another new resonance, with proton-proton collision...

10. Probing the Supersymmetric Standard Model at the Large Hadron Collider through Vector Boson Fusion Processes and Machine Learning

Umar Sohail Qureshi (Vanderbilt University)

31/07/2024, 09:40

BSM

Talk

We present a phenomenology study probing the Supersymmetric Standard Model (SSM) at the Large Hadron Collider for a previously unexplored region of the parameter space.
In particular, we consider proton-proton collisions at $\sqrt{s}=13$ and $\sqrt{s}=14$ TeV and investigate the production of GeV-scale first and second-generation neutralinos $\widetilde{\chi}_{1}^{0}$ and...

52. Search for heavy BSM particles in final states with boosted top quarks or W bosons at CMS

Alberto Orso Maria Iorio (Istituto Nazionale di Fisica Nucleare)

31/07/2024, 10:00

BSM

Talk

We present results from recent searches for resonances with enhanced couplings to top quarks or W bosons, collected with the CMS detector at a center-of-mass energy of 13 TeV. The analyses presented rely on state-of-the-art boosted-object identification techniques to reconstruct hadronic and leptonic top quark and W boson decays, targeting various signatures from single and pair production of...

17. Searches for new physics using unsupervised machine learning for anomaly detection in $\sqrt{s}$ = 13 TeV $pp$ collisions recorded by the ATLAS detector at the LHC

Benjamin Michael Wynne

31/07/2024, 10:20

BSM

Talk

Various searches for new resonances using unsupervised machine learning for anomaly detection are presented. These searches look at two-body invariant masses including leptons, at a heavy resonance Y decaying into a Standard Model Higgs boson H and a new particle X in a fully hadronic final state, or at the masses of two jets.

57. Searching for new physics detecting anomalies in jets

Roberto Seidita (Istituto Nazionale di Fisica Nucleare)

31/07/2024, 11:00

BSM

Talk

A model-agnostic search for new physics in the dijet final state with the CMS experiment is presented. Other than the requirement of a narrow dijet resonance with a mass in the range of 1800-6000 GeV, minimal additional assumptions are placed on the signal hypothesis. Search regions are obtained by utilizing multivariate machine learning methods to select jets with anomalous substructure. A...

18. Searches for boosted resonances (non-diboson) and semi-visible jets with the ATLAS detector

davide melini (Technion)

31/07/2024, 11:20

BSM

Talk

Many new-physics signatures at the LHC produce highly boosted particles, leading to close-by objects in the detector and necessitating jet substructure techniques to disentangle the hadronic decay products. This talk will illustrate the use of these techniques in recent ATLAS searches for heavy W' and Z' resonances in top-bottom and di-top final states, as well as in searches for vector-like...

65. Unsupervised tagging of semivisible jets with Wasserstein Normalized Autoencoders

Florian Eble (ETH Zurich)

31/07/2024, 11:40

BSM

Talk

The field of anomaly detection (AD) has been steadily gaining traction in high energy physics as a powerful tool in the search for physics beyond the standard model (BSM), reducing the reliance on exact modelling of specific signal hypotheses. Arguably the most commonly used architecture is some flavor of autoencoder (AE), a network trained to compress examples to a latent space and decompress...

7. Enhancing LHC searches for Dark Matter with Graph Neural Networks

Rafał Masełek (LPSC (Grenoble))

31/07/2024, 12:00

BSM

Talk

Approximately one-fourth of the energy density of the known Universe is attributed to Dark Matter (DM), the nature of which remains enigmatic. If DM is made of particles, producing and studying them at the Large Hadron Collider may be possible. A promising method to achieve it is to consider a monojet channel, in which at least one hard jet recoils against a missing transverse momentum, and...

73. Semi-visible jets, energy-based models, and self-supervision

Luigi Favaro (ITP - University of Heidelberg)

31/07/2024, 12:20

BSM

Talk

We present DarkCLR, a novel framework for detecting semi-visible jets at the LHC. DarkCLR uses a self-supervised contrastive-learning approach to create observables that are approximately invariant under relevant transformations. We use background-enhanced data to create a sensitive representation and evaluate the representations using a normalized autoencoder as a density estimator. Our...